Schedule 3, Line 12d in TurboTax Deluxe

I need to claim a credit for prior year (2019) income that was repaid in 2020 (>$3000).  I understand this can be entered into Schedule 3, line 12d as "IRC 1341" claim of right according to Publication 525.  However, in the 2020 TurboTax Deluxe software, I am having difficulty finding where/how to enter this information so it populates Schedule 3.  Any guidance is greatly appreciated.